Jason Mackin created PDFBOX-3015:
------------------------------------
Summary: PDICCBased loadICCProfile() throwing
ConcurrentModificationException
Key: PDFBOX-3015
URL: https://issues.apache.org/jira/browse/PDFBOX-3015
Project: PDFBox
Issue Type: Bug
Components: Rendering
Affects Versions: 2.0.0
Environment: Windows 8.1 Pro
java 6-8
tomcat 6-7
Reporter: Jason Mackin
When running a load test using PDFRenderer's method
renderImageWithDPI(pageIndex, 175), I am receiving a
ConcurrentModificationException. I only receive this using Java 6-8 and Tomcat
6 or 7, 8 seems to work fine. I can reproduce this with as little as 4
concurrent threads kicked off at the same time. It only happens the first time
the method is called (server startup), after that it works fine.
Here is the stacktrace:
{quote}
java.util.ConcurrentModificationException
at java.util.Vector$Itr.checkForComodification(Vector.java:1156)
at java.util.Vector$Itr.next(Vector.java:1133)
at
sun.java2d.cmm.ProfileDeferralMgr.activateProfiles(ProfileDeferralMgr.java:93)
at java.awt.color.ICC_Profile.getInstance(ICC_Profile.java:775)
at java.awt.color.ICC_Profile.getInstance(ICC_Profile.java:1013)
at
org.apache.pdfbox.pdmodel.graphics.color.PDICCBased.loadICCProfile(PDICCBased.java:119)
at
org.apache.pdfbox.pdmodel.graphics.color.PDICCBased.<init>(PDICCBased.java:89)
at
org.apache.pdfbox.pdmodel.graphics.color.PDColorSpace.create(PDColorSpace.java:162)
at
org.apache.pdfbox.pdmodel.PDResources.getColorSpace(PDResources.java:155)
at
org.apache.pdfbox.contentstream.operator.color.SetStrokingColorSpace.process(SetStrokingColorSpace.java:41)
at
org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:799)
at
org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:461)
at
org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:438)
at
org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:149)
at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:180)
at
org.apache.pdfbox.rendering.PDFRenderer.renderPage(PDFRenderer.java:208)
at
org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:139)
at
org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:80)
{quote}
Since the problem was with a java class not being synchronized, I added a
simple static synchronized method to PDICCBased.java to load the profile and
prevent the race condition:
{quote}
private static synchronized ICC_Profile getICCProfile(InputStream input)
throws IOException \{
return ICC_Profile.getInstance(input);
\}
{quote}
And call it from the loadICCProfile method:
{quote}
ICC_Profile profile = PDICCBased.getICCProfile(input);
{quote}
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